Consin



(No Model.) 6 Sheets-Sheet 1.

A. J. ,& A. LINDEMANN.

STOVE PIPE ELBOW MACHINE.

No. 441,42 Patented Nov. 25, 1890.

we mamas PETCRS co. FHcTn-UTHKL, msmmamu, o. c.

(No Model.)

6 Sheetv-Sheet 2. A. J. & A. LINDEMANN.

STOVE PIPE ELBOW MACHINE.

Patented Nov. 25, 1890.

m: NORRIS Perms 00.. mom-mum, wnsumm'ou, w. c.

(No Model.) I 6 Sheets-Sheet 4. A. J. 86 A. LINDEMANN.

STOVE PIPE ELBOW MACHINE.

No. 441,426. Patented Nov. 25, 1890.

m: NORRIS Pains C04, momumo., WASNINGYDN, o. c.

(No Model.)

6 SheetsSheet 5.

A. J. & A. LIN-DBMANN. STOVE PIPE ELBOW MACHINE.

PatentedNov. 25, 1890.

heats-sheet 6.

(No Model) 4. J. 44.411411 54444114. STOVE PIPE ELBOW MACHINE. 140,441,426. 'Patent'edNomZB, 1890.

Turn.

UNITED STATES PATENT men.

ALBERT J. LINDEMANN AND AUGUST LINDEMANN, OF l\lIL\VAUKEE, VIS- CONSIN, ASSIGNORS TO J. P. LINDEMANN dc SONS, OF SAME PLACE.

STOVE-PIPE-ELBOW MACHINE.

SPECIFICATION forming part of Letters Patent No. 441,426, dated November 25, 1890.

Application filed March 26, 1890. Serial No. 345,349. (No model.)

T0 at whom it may concern:

Beit known that we, ALBERT J. LINDEMANN and AUGUST LINDEMANN, of Milwaukee, in the county of Milwaukee and in the State of WVisconsin, have invented certain new and useful Improvements in Machines for Making Stove- Pipe Elbows; and we do hereby declare that the following is a full, clear, and exact description thereof.

Our invention relates to machines for making stove-pipe elbows; and it consists in certain peculiarities of construction, as will be fully set forth hereinafter and subsequently claimed.

In the drawings, Figure 1 is a side elevation of our machine; Fig. 2, a like elevation of the opposite side of our machine with the fly-wheel removed. Fig. 3 is a rear elevation. Fig. 4 is a vertical longitudinal section of our machine in the position shown in Fig. 2, taken on the line 4 4 of Fig. 3. Fig. 5 is an enlarged detail view of portions of the crimping mechanism. Fig.

G is a partly-sectional enlarged detail view,

showing portions of the blank-holding mechanism from the rear, the section being taken on line 6 6 of Fig. 4.. Figs. '7 to 14, inclusive, are detail views illustrating peculiarities in the construction of the dies and adjacent mechanism; and Fig. 15 is a detail top view of portions of the seaming-clutch mechanism partly broken away.

A' represents the bed of our machine supported on and bolted to suit-able legs 13 B. Resting on said bed is the main casting comprising a tubular portion 0, with an elevated rear bridge portion D, which forms the bearings for the transverse shaft E of the fiywheel F, (which is also a band-wheel, and loose on its shaft.) there being suitable legs, ribs, and strengthening-flanges, as a a a, depending from said casting and resting on said bed to form a steady and sufficient support.

G represents the inner rod, which serves to move the collapsible die, as hereinafter ex plained, and this rod G extends through the tubular casting C, and entirely through the machine at each end, passing also through the sleeve-rod H, which is likewise within said tubular casting G, and which passes out (around rod G) at the rear, as best shown in Fig. 4. At the front there is an exteriorly square continuation H of the sleeve-rod inclosing the rod G, and screw-joined (as at b) to the sleeve-rod proper H. The other end of the sleeve rod H terminates beneath the bridge portion D of the casting and there receives a grooved guide-sleeve I, one end of which is split, as shown at i, and clamped to the sleeve-rod H bymeans of ascrew '5 ,passing through the divided portions of this sleeve I at this point, said sleeve I having a circumferential groove '9, as shown. The adjacent and protruding end of the rod G likewise carries a sleeve J, having a similar circumferential groove j, to serve as a guide, as

hereinafter explained, the extreme end of the rod G being preferably split, as shown at g,

and expanded by a screw 9' to clamp the sleeve J and rod G together. 3

D D are two laterally-projecting portions of the described casting, which serve as bearings for the shaft K, which carries the camdrum K and bevel gear-wheel K having upon its opposite face the cam-disk K the outline of the cam-groove k in said disk K m and m m g-moving, respectively, in the 8 grooves j and i of the guide-sleeves J and I, said lever-arms of the spanners M M being pivoted, as shown at M, to the horizontal arm of an angular bracket D whose vertical arm is bolted to a leg of the main casting, as

shown at c c. The shaft E carries near its end farthest from the fly-wheel F a bevel-pinion L, which meshes with the large bevel gear-wheel K and beyond this point the inner end of said shaftE has its bearing in the main casting, and is covered by a cap D secured by screws (1 N is a clutch-disk keyed, as shown at a, to the fly-wheel shaft E, and this clutch has a hub N, which on one side has an extension rco The cam-drum K is provided 80 n, having a groove 11 therein which receives a spring a and a two-part dog, the inner layer N of which normally extends out farther beyond the periphery of the clutchdisk N than does the outer layer N said dog being provided with a slot, as a to receive a pin n projecting therethrough from the said disk N to limit the outward throw of said dog against the force of the spring 01 The layer N has a curved end 029 and a lip n, and the layer N a lip 01', the latter for engagement at the proper time with a series of pins a (four, less or more, in numbelg) projecting from the inner side of the fly-wheel F.

O is a block bolted, as shown at o 0, to one of the legs a of the main casting, and this block has a key-hole slot 0 to receive a movable lug O, similarly shaped (by means of a rib 0 at its outer end, and which lug O has a laterally-projecting pin 0 which has movement within a slot 0 in the side of the said block 0.

O is a ratchet-wheel having (in this instance) nine teeth 0 0 which wheel is journaled on an arbor 0, projecting from a leg (1- of the main casting and secured in place by means of a washer o and nut 0 as shown, said wheel 0 havinga pin 0 (having a beveled or cam-shaped end,) projecting from he face of said wheel 0 adjacent to one of its teeth, which latter are adapted for successive engagementwith the end of a pawl 0 which is pivoted on a pin or arbor o", projecting from the upright rear arm 6 of the rack-bar E, said pawl being held down against the ratchet-wheel O by means of a spring 0*", one end of which is secured to said arm a, as

shown at 0', and the other end of which (not shown) rests on the hub or other part of the said pawl 0 v P designates the long arm of an irregular bell-crank lever whose top is on a plane with the just-described pin 0 and intended to move said pin back in its slot 0* at the proper time, and said lever is fulcrumed, as shown at p, to the bed A, the short arm P of said lever being pivoted, as shown at 19', to the upper end of a connecting-rod P whose lower end is preferably bifurcated, as shown at 19 and there connected to a treadle-arm P whose end beyond this pointis secured in any suitable manner, as between the uprights of i a forked bearing 17 by a journal or pivot p and on the other side of the point of attachment of said connecting-rod P the treadlearm P is connected to one end of a spring P whose upper end is connected to any suitable portion of the main casting or bed as found most convenient, its function being to hold the free end of the 'treadle-arm P up in an inclined position, and said arm terminates in a suitable foot-piece P for use when the same is to be depressed against the action of said sprin Q is the front casting or standard of the machine restingon and secured to the bed A, as shown at q q, and said standard has a circular opening q therethrough, below which is a square-edged slot (1 receiving a square nut Q and hubs g on the ends of the separable halves or segments Q Q forming the clamping-ring, are held against this nut Q by a screw-bolt Q, the side walls of the slot being slightly tapered, converging from front to rear, and the nut being similarly shaped on its side edges and the bore of the nut being screw-threaded to receive the reduced and screw-threaded end of the bolt Q. Below this nut Q and'within said slot q there is located a turn-screw Q whose head is provided with holes or other means for turning it and bears up against the bottom face of said nut and whose screw-threaded shank engages with a similarly-t1] readed bore 9 in the lower part of the standard 0. Each of the clamping-ring segments Q Q is provided with a wing q, to which is bolted a nut Q, the nuts Q Q being, respectively, right and left threaded to receive the right and left threads g f of the shaft Q said shaft having its hearings in brackets q q bolted to the standard. Q and being provided with a handle Q, or other convenient means, for operating it when required. The upper part of the standard Q is provided with an arc-shaped slot g which receives the enlarged hub r of a rod or bolt projecting both ways from said hub, one arm 0" carrying a block I R, which fits within a somewhat Wider slot 1" in a larger block R while the other arm 1' is preferably squared off on top and bottom so that the bore of the end 4' of the crank-arm R, which receives it, may be larger above and below said bolt-arm 0 as shown at '0" T (in dotted line, Fig. 6,) and said bolt-arm r and crank-arm end 7' are vertically perforated, the perforation in the arm The other end of the crank-arm R is keyed, as

shown at a, to a longitudinal shaftR, Whose other end finds its bearing in an upward extension D of the aforenamed main casting, having a cap D secured thereto by screws (1 there being preferably a collar D next said hearing, held in place by a screw (1 as shown, and the extreme end of said shaft R beyond said bearing D has keyed or otherwise secured to it a lever R from whose free end there projects a pin 7', which engages with the cam-groove 7,1 in the described camdisk K The standard Q is provided above its described circular opening q with two arc-slots Q Q segmentally arranged, each of which receives an arc-shaped guide-lugs, which are pivot-ed, as shown at s", on one side of each of the upper crimping-blocks S, the lower portions of which are re-enforced on their opposite sides to form bearing-plates 5 the lower lower portions, and each pivoted, as shown at to the standard Q, the face of the block S being cut away to provide for the crossing .andmovement of the block S thereon, as

shown in Fig. 5, the opposite side of the block .8 being, of course, similarly cut away, while above the said faces 8 s of said blocks S S these blocks are reduced (on that side) in thickness, as shown at s s, and at their upper .ends are pivoted, as shown at 3 to the adjacent ends of links S S (which ends rest on the said reduced face of the blocks S S so theouter faces of the said links will be on the same vertical plane with that of the faces :5 8 the other ends of said links S S being pivoted, as shown at 8 to the block R said ends resting on the reduced face of the lower .corners of said block, as shown at r", to keep the exterior faces of all these parts in the same vertical plane as before named, and the adjacent ends of the lower links S S are likewise pivoted on said reduced faces r of said block R as shown at 8 8 the other ends of said links S S being similarly pivoted, as shown as s s, to the upper crimping-blocks S S. These crimping-blocks are preferably grooved on their-circular inner faces to receive the crimping-blades S S which taper in projection from the crimping-blocks, as shown, from their base ends. to their upper ends, and the operative faces of which similarly decrease in width from their lower toward their upper ends. All of the described links and crimping-blocks are protected by a front casing-plate S, held against the standard Q by the described lower pivot-bolts s s and upper bolts 8 s and suitable nuts 3.

The tubular portion 0 of the main casting, hereinbefore referred to, is provided with an upper exterior longitudinal groove 6, extending the whole length thereof back to the upper rear elevated portion of said casting, and this is fitted with a movable rack-bar E, having on its upper face a series (as eight) of teeth 6 e, and at the rear end an upright arm e to which is journaled, as shown at 6 an anti-friction roller E between the inner face of said arm 6 and the adjacent periphery of the cam-disk K which latter is provided with a peripheral cam K, said arm 6 further serving as a bearing forone end of a stiff spring E whose other end is received in a recess d in the described extension D of the aforenamed casting, adjacent to which is a holding-down strap (1 secured to said casting and projecting over the rear end of the said rackbar E. The forward end of this rack-bar is provided with a slot 6 to receive a screw e which projects down into the top of thesaid tubular portion 0 of the casting to retain the rack in place and limit its movement, the upper portionof said slot being longer and wider than the lower portion thereof, to accommodate the head of said screw a whereby the front end of said rack-bar is prevented from rising.

F is a ring (which We term the feed-ring) surrounding the tubular casting O and rackbar E, said ring being slotted, as shown at f, to receive the latter, which forms thereby a guide for said feed-ring, the latter having an annular groove f on one sideto receive a joint of stove-pipe, as hereinafter described. On top of this ring is a rearwardly-extending arm F having a bifurcated end or central end slot f said arrn being secured to the ring F, as by screws f f and the bifurcated end of the said arm istransversely perforated to receive one arm of an L-shaped rod f which carries (within the slot f one end of a dog F whose point or free -end engages with the described teeth e on the said rack-bar E, saiddog and arm being rigidly connectedtogether by a screw f and the bent end of said rod 1, carrying a weight f.

The ring F may haveahandle f, as shown,

nions g and said end of the rod is further split, so that when said nut has been screwed thereon the split ends may be expanded by a screw 9 to clamp said nut tightly in place. The front end of the tubular casting C is covered with a steel face-piece 0, held to place by a steel ring 0 and this face-piece G is perforated for the passage therethrough of the inner rod G and externally-squared sleeverod extension H, which latter has at its forward end on the under side a lip or projec- T are bolt-holes t t to receive the screw-bolts t 25 which secure the wings U U, whose inner edges conform in shape to that of the side edges of the tongue T? and have notched ends a u projecting below the lower line ofsaid tongue, said wings U U being further provided with are grooves a a and oblique slots a a vThe recessed sides 25 t of the rear face of the die-body T are provided with irregular (approximately triangular) slots t i which extend only partially through the diebody and are intersected by otherand transverse kidney-shaped slots t t, which latter extend through to the front face of the die-body proper, said front face having integral stationary side wings T T which project over the front face proper from each side, so as to leave vertical walled grooves 15 beneath or back of the inner projecting edges of said wings T T and this front face receives a slide V, whose lower edge is rounded and shaped to complete the circle at this point with the described wings U U when the lat -ter are spread, and whose lower rear face is provided with a groove 2;, coinciding with the grooves u in said wings, (in this position of the latter,) all as shown in Fig. 7. Said slide V is further provided with a vertical oblong central slot V, Whose height is about equal to the combined height of the slot 25 (in the die-body T) and the slot 25 (through the tongue T on the adjacent front face of the die-body. Said slide is further provided with two upper angular open-topped slots 1; 1), one on each side of the said central slot V. These slots 1; rreceive long round pins ww, projecting from above the centers of thelever-bars WV, which lever-barshave projecting from the same side, at one end, other and shorter round pins w, which form pivot-pins, and are socketedin holes 25", extending through the die-body from the apeXes of the slots i the long pins 10', just named, extending first through the transverse kidney-shaped slots t and thence into the angular slots 1), in the slide V, as already stated. At the other end of the lever-bars W and projecting from the opposite side of the same are the oblong pins V, which latter work in the oblique slots 10 in the movable wings U. The slideVis provided with series of screw-threaded holes o 01 to receive the screws which secure to said slide the lugs X, which are transversely perforated for the reception of the ends of the journal or trunnions at of the hinge-piece X, whose free end is bifurcated and transversely perforated tov receive or straddle the lip or projection h on the end of the sleeve-rod extension H, secured thereto by bolt or pivot X The side wings T T on the front face of the die-body are provided with transverse grooves t which receive corresponding transverse projections 31 on the rear of the outer plates Y, (which are of the same outlines as that of the said side wings T which plates Y are secured to the said side Win gs by screws 31, passing through perforations in said plates and into screw-threaded perforations t in said side wings, and these plates Y have perforated peripheral lugs 1 which receive the projecting round lugs or pins g on the ends of links Y, whose other ends are provided with round perforations to receive the described trunnions g on the nut G on the extreme front end of the described inner rod G. The rear face of the collapsible die and its wings U U are protected by a case-plate U, slotted to admit the passage therethrough of the hinge-pieceT and sleeve-rod extension H,

and below the latter slot said plate U is perforated to receive the screws u, which pass derstood from the foregoing-description of its construction, taken in connection with the accompanying drawings. A joint of plain stovepipeZ, of the proper length and loosely rolled, is inserted at the front end of the machine, with the rear end of said joint inserted in the annular groove f of the feedu'ing F, which ring at this stage is pushed backas far as the first leg a of the main castingwill allow, as shown in Fig. 1. The front end of said joint Z is clamped against the outer periphery of the steel ring 0 (with a certain degree of tightness, enough to hold by frictional contact, but not to prevent movement of the joint at the proper time) by the clamping ring segments Q Q, operated through the thread in their nuts Q Q actuated bythe shaft QT. The dies are now in the position shown in Fig. 4. The operator now steps on the foot-piece P, which through the action of the treadle-arm P connecting arm P and connected bell-crank lever P P, forces back the pin 0 on the lug Oin its slot 0 which releases the two-part dog N N 3 on the clutch-disk N from the position shown in dotted lines in Fig. 2, and the force of the spring a forces said dog out into the position shown in full lines in said figure, with the lip n of the layer N 3 of said dog in the path of travel of the pin n on the inner face of the flywheel F, and as the latter (which, as stated, is loose on its shaft E) is revolved by its band or belt (not shown) the adjacent pin n comes against said lip n and temporarily clutches the fly-wheel F to its shaft E, and as said flywheel thus clutched continues its revolution the bevel-pinion L, fast on said shaft E, which is in mesh with the larger bevel gear-wheel K revolves the latter and the cam-disk K, fast with said wheel K thereby causingthe pin Won the free end of the leverR to travel in the cam-groove 7a in said cam-disk K and thereby to vibrate said lever B, keyed on shaft R and thereby reciprocating the crank arm R, keyed 011 the other end of said shaft R and the bolt projecting from the head 0' of said crank-arm within the slot q of the standard Q, and thus, through the blocks R R and the links connected to the latter and their connections, actuating the crimpingblocks S S S and as the blocks R R rise contracting the crimpingblades around the joint of pipe Z, forming the crimpzgwhich as first made is a square crimp, as shown in Fig. 4. As the camdisk K further revolves, the pin 'r in continuing its travelin the camgroove it, causes the crank-arm head 7" and the connected blocks R R to descend, and thereby expand the crimping-blocks S S S and withdraw the crimping-blades S from on the shaft K of the crank-disk K has been so moved that its peripheral cam-grooves 7t the joint Z, and meanwhile the cam-drum K k which receivethe pins m m on the leverarms of the spanners M M begin to move said pinslaterally, (said pins having till now been idle in the straight portions of the said cam-grooves m M and this lateral movement of the said pins actuates the inner rod G and sleeve-rod H, the rod Gserving to draw the die inward against the lower operative edge of the steel ring G (which has an outward bevel c at this point,) while the continuation H of the sleeve-rod II and its connections serve to hold the slide V in the proper lowered position, (shown in Figs. 4 and 13,) and the continued rear draw of the rods G and H H, by the action of the camdrum, changes the square crimp 2 into a triangular-shaped crimp .2, as best shown the pin m and the rod G, connected by span-. -ner M therewith, remain stationary for the lip h and hinge-piece X draws on the slide edge 0 of the steel ring 0 in Fig. l3,this resulting from the form of the grooves u e in the parts U UVof the die, in connection with the described beveled The crimp first made is next the outer end of the joint, and

in order that the joint may be moved outward past the crimp 2 already finished, the die must be collapsible and the slide must rise and the wings move in against the tongue to leave space around the die for the passage of the said j list-completed crimp, as follows:

The groove is remains straight, (as the camdrum K continues its revolutions) and hence present; but the groove 70 runs at an angle,

and hence moves the pin m laterally, forcing the sleeve-rod H H forward, which through I cam K against the anti-friction pulley E journaled in the upright arm 6 of the rackbar E, the said cam forcing the said rackbar forward the distan cc of one tooth 6 thereon, which, by reason of the dog F carries the feed-ring F and joint Z a like distance forward, the spring E serving to retract the rack-bar to its original position the moment the cam K has passed the wheel E and the just-named forward movement of the said rack-bar serving, through the pawl 0 pivoted'to its upright arm 0 to draw on the ratchet-wheel O and revolve it the space of one of its teeth 0 The cam-grooves 7t k now again deviate for a straight line, and both become active, causing the rod G to move forward and the sleeve-rod H H slightly back, which again spreads the wings U U and lowersithe slide V of the die to the position shown in Fig. 4, when the operation already described is repeated and a new crimp 2 formed, and this is continued until (in the arrangement shown in the drawings) nine crimps have been formed, which brings the pin 0 on the face of theratchet-Wheel O a trifle above the horizontal line of the pin 0 on the lug O, pushing said pin o outward (to the position shown in Fig. 15) as it passes, and then, as the clutch-disk N is revolved to this point, the curved end at on the layer N of the two-part dog on said clutch-disk engages with the rib 0 on the lug O and gradually forces said dog back against the force of its s ring 11 until said rib 0 comes in direct contact with the lip a? on said dog, as shown in dotted lines in Fig. 2, which stops the machine, as thereby thelip n on said dog is withdrawn from the path of the pins a on the flywheel F, and thelatter (being thus u nclutched) is free to revolve loosely on its shaft E. The successive crimping of the joint Z being heaviest on the under side thereof gradually bends the same into the completed shape shown in Fig. 4, and it now only remains to remove the finished articlefrom the machine.

An important feature of our machinelies in the fact that it is self-cleaning, as all scale that falls from the joint being operated upon drops down through the hole Z and does not fall upon any delicate or important part of the mechanism. In the collapsible die the slide supports the wings when in operative .position, and thereby the device is strong and durable, and the machineis entirely automatic, and hence not liable to injury aswhere the motions of the parts have to be timed by the judgment of the operator.

Having thus described our invention,what we claim as new, and desire to secure by Letters Patent, isf j 1. In a machine for making stove-pipe elbows, the combinationof a tubular casting with a collapsible die, a die-moving rod passing through said tubular casting, a sleeve-rod also passing therethrough and surrounding said first-named rod, links connecting said die with said rods, and mechanism for recip rocating said rods independently, substantially as setforth.

2. In a machine for making stove-pipe elbows, the combination, with a casting having a face-plate and surrounding beveled ring, of a collapsible die, a rod linked to said die at one end and carrying a circumferentially grooved collar at its other end, a sleeve-rod surrounding the first-named rod and also linked to said die at one end and carrying a oircumferentially-grooved collar at its other end, a revolving cam-drum havingdiiferentlydirected cam-grooves in the periphery there'- of, spanners having lever-arms pivoted to said casting, pins on said lever-arms in engagement with said camgrooves, and headedpin's on the forked ends of said spanners engagmg with the said grooves in the collars on v 8. In a machine for making stove-pipe elbows, the combinatiomwith a suit-able frame and shaft journaled therein, of a fly-wheel loose on said shaft, a clutch-disk keyed to the same shaft and having a movable spring pressed two-part dog secured thereto consisting of two layers, each having a projecting end lip, one of said layers extending farther from the center of said disk than the other, a slotted block secured to said frame, a lug sliding in said block and having a rib for temporary engagement with the lip on one layer of the two-part dog, and a series of pins projecting from the inner side of the flywheel for temporary engagement with the lip on the other layer of the said two-part dog,

, substantially as set forth.

4. In a machine for making stove-pipe elbows, the combination,with a suitable frame and shaft journaled the-rein, of a fiy-wheel loose on said shaft and carrying a series of inwardly-proj ectin g pins, a clu tch-disk keyed to the same shaft, and having a movable spring-pressed two-part dog secured thereto consisting of two layers each having a projecting end lip, one of said layers extending farther from the center of said disk than the other, a slotted block secured to said frame, a lug sliding in said block and carrying arib for temporary engagement with the lip of one layer of the two-part dog, and a lateral]y-projecting pin, a ratchet-wheel on said frame having a bevel-ended pin projecting from its face for engagement with said lateral pin, and a reciprocating rack-bar carrying a pawl for engagement with said ratchet-wl1eel, substantially as set forth.

' 5. In a machine for making stove-pipe elbows, the combination, with a suitable frame and shaft journaled therein, of a fiy-wheel loose on said shaft and carrying a series of inwardly-projecting pins, a clutch disk keyed to the same shaft and having a movable spring-pressed two-part dog secured thereto consisting of two layers, each having a projecting end lip, one of said layers extending farther from the center of said disk than the other, a slotted block secured to said frame, a lug sliding in said block and carrying a rib for temporary engagement with the lip of one layer of thetwo-part dog, and a laterally-proj ecting pin, a bell-crank lever whose top is on a plane with said pin, a connecting-rod pivoted to said lever, and a treadle-arm connected to said connecting-rod, and by asprin g to said frame, substantially as set forth.

6. .In a machine for making stove-pipe elbows, the combination, with a slotted standard and a series of movable crimping-blocks, actuating mechanism, and connecting-links, of crimpin gfblades projecting from the curved innerfaces of said crimping-blocks, and which taper or decrease in projection from said crimping-blocks from theirbase ends to their upper ends, and the operative faces of which similarly decrease in width from their lower toward their upper ends, substantially as set forth.

7. In a machine for making stove-pipe elbows, the combination, with a standard provided with a central circular opening and are slots above the same, of upper crimping-blocks pivoted to arc-shaped guide-lugs moving in said are slots, independent upward-extending lower crimping-blocks pivoted to the lower part of said standard and crossing each other, and crimping-blades secured to and projecting from the inner curved edges of the said several crimping-blocks, substantially as set forth.

8. In a machine for making stove-pipe elbows, the combination, with a standard having a central opening, of aseries of crimpingblocks and actuating mechanism, and crimping-blades secured to and projecting from the inner curved faces of said blocks, said blades having their greatest width and projection at the base, and thence tapering and decreasing toward the top, substantially as set forth.

9. In a machine for making stove-pipe elbows, the combination, with a suitable frame and a transverse shaft journaled therein, of a band-wheel clutched to one end of said shaft and a pinion on the other end thereof, a longitudinal shaft supported on raised bearings at each end of the machine, a gear-wheel on said shaft in mesh with said pinion, a camgrooved disk rigid with said gear-wheel, a lever on the rear portion of said shaft having a pin ,on its free end in engagement with the cam-groove in said disk, a standard at the front of the machine having an upper longitudinally-arranged arc slot and a central opening, a crank-arm on the front portion of said longitudinal shaft, abolt projecting from the free end of said crank-arm through the said upper arc slot and carrying a block at its extreme end, a sliding block moving in vertical ways in the upper part of the said standard and provided with a slot for the reception of the last-named block, and a series of crimpin g-blocks pivotally attached to said standard and linked to said sliding block and carrying projecting crimping-blades surrounding said circular opening, substantially as set forth.

10. In a machine for making stove-pipe elbows, the combination, with a suitable frame having a standard at its front end "provided with an upper longitudinal arc slot, a central opening, and vertical guideways, of a longitudinal shaft j ournaled in said standard, and in suitable rear bearings, a crank-arm on said shaft having a transverse perforation through its free end, a bolt having an enlarged hub fitting in said are slot and projecting both ways therefrom, one arm of said bolt carryin g a block and the other arm passing through the bore in said crank-arm end and being squared off on its upper and lower surface and secured to said crank-arm end bya clamping-nut, a vertical adj Listing-bolt centrally screw-threaded passing through perforations in said crank-arm end and through a screwthreaded perforation in said squared bolt-arm,

a sliding block moving in the said vertical guideways of the standard and slotted for the reception of the said other block, and a series of crimping-blocks pivotally attached to said standard and linked to said sliding block and carrying crimping'blades, substantially as set forth.

11. In a machine for making stove-pipe elbows, the combination of a tubular casting, a collapsible die, and operating-rods attached to the latter and passing through said casting, of a face-plate and surrounding ring attached to said casting, a standard having a circular opening coinciding with the front end of said casting and are slots and bearingbrackets above and a tapering-edged slot below said circular opening, a tapering-edged nut and an adj rusting-screw in said lower slot, separable clamping-ring segments secured to said nut and surrounding said circular opening, right-and-left-threaded nuts bolted to projections on said segments, and a shaft supported in said bearing-brackets and havin g right-and-left screw-threads formed thereon for engagement with said correspondinglythreaded nuts, substantially as set forth.

12. In a machine for making stove-pipe elbows, the combination of a tubular casting, a collapsible die, and operating-rods attached to the latter and passing through said casting, of a face-plate and surrounding ring attached to said cast-ing, a standard having a circular opening coinciding with the front end of said casting, an upper longitudinal arc slot, and intermediate arc slots above and a tapering-edged slot below said circular opening, and vertical guideways on the upper part of the other side of said standard, a slotted sliding block moving in said ways, crimpingblocks pivotally attached to said standard and linked to said sliding block and having projecting crimping-blades surrounding said circular opening, a tapering-edged nut in said lower slot, separable clamping-ring segments secured to said nut and surrounding said circular opening, and carrying screwthreaded nuts, a screw-rod in engagement with the said nuts on the segments, a powershaft having a crank-arm at one end, and a bolt projecting from the free end of said crank-arm, projecting through said upper arcslot and carrying a block moving in the slot in said sliding block, substantially as set forth.

13. In a machine for making stove-pipe elbows, the combination, with a tubular casting, a die-operating sleeve-rod passing therethrough and terminating at its forward end in a downward projection or lip, and another die-operatin g rod passing through said sleeverod and projecting beyond the forward end of the latter, of a face-plate on the end of said casting, provided with an opening for the passage therethrough of said sleeve-rod, and having a curved slot above said opening, a ring surrounding the front end of said castsleeve-rod, and linkscoiinecting the'trujn nions of the nut-on the said'inner rod with the said collapsible die, substantially-asset forth.

14. In a machine for making stove-pipe elbows, the combination, witha tubularcasting having a slotted face-plate on its end surrounded by a beveled-edged ring, and a dieoperating sleeve-rod, and inner projecting rod passing through said casting and faceplate, of a collapsible die hinged to said faceplate and linked to said inner rod and carrying a slide with a grooved lower inner edge hinged to said sleeve-rod, substantially as set forth.

15. In a machine for making stove-pipe elbows, the combination, with a suitablecasting' and face-plate, and an inner die-operating rod and surrounding sleeve-rod passing therethrough, and rod-actuating mechanism, of a slotted die-body hinged to said face-plate, movable wings pivoted to said die-body, a slide hinged to said sleeve-rod, lever-bars having operative pins located in and projecting through slots in said die-body, and links connecting said die-body with the outer end of said inner die-operating rod, substantially as set forth.

16. In a machine for making stove-pipe elbows, a collapsible die consisting of a wedgeshaped die-body having its rear side recessed or cut away to leave a central tongue, movable wings pivoted to the upper part of said rear face and having inner edges conforming to the shape of the side edges of the said tongue, and notched lower ends projecting below the bottom line of the latter, said wings having arc grooves and oblique slots formed therein, the said recessed sides of the said rear face having irregular approximatelytriangular slots extending partially through the die-body and intersected by transverse slots extending through to the front face of the die-body proper, said front face having integral stationary side wings projecting over it from each side, leaving vertical walled grooves beneath or back of the inner projecting edges of said wings, a slide on said front face Whose lower edge is rounded and shaped to complete the circle at this point when the said movable wings are spread and whose lower rear face is provided with a rounded groove coinciding with the grooves in said movable Wings, the said slide having upper angular open-topped slots, one on each side, and there being central slots through said die-body and slide, lever-bars located in the approximately-triangular slots and having on IIO one side long pins projecting through said transverseslots and said openftopped slots, and shorter pivot-pins at one end on thesame side socketed in said die-body, and at the other end and side oblong pins working in said oblique slots in the movable Wings, and

front and rear face-plates, in combination with a tubular casting, face-plate, and beveled edge surrounding-ring, and inner andsleeve rods passing through said casting, rodactuating mechanism, and links connecting said inner rod with the front faceplate of the 

